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A
Hot and cold
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B
Temporary (such as waxing/shaving) and permanent/long-term (such as certain advanced methods)
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C
Cheap and expensive
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D
Fast and slow
Why this is the answer
Hair removal methods fall into two broad categories: temporary methods, which remove hair for a period of time (such as waxing, tweezing, shaving, and depilatories), and permanent or long-term reduction methods (such as certain advanced light/laser or electrolysis methods, some of which may require specific licensing). Cosmetologists commonly perform temporary methods like waxing within their scope. Understanding the basic categories of hair removal — and that some advanced methods have their own requirements — is part of the hair-removal content.
Source: Skin & Nails — Hair Removal Types